Re: [PATCH] Exploiting dual mode operation, implementation.

[Leehod Baruch <sleehodb at t2 dot technion dot ac dot il>]

> My point still stands.  se4 is *not* optimal, by any streach of the
> imagination.  What *is* optimial is the original se1 and se2.
I wrote in the original note that use2 can be done in any mode. 
So it can be done on SI mode, which leaves after combining the use 
with se4 only se3. This is better than leaving the web as it was 
before.
                         def1            def2
                                         se3 
                            \           /
                             \         /
                              \       / 
                               \     /
                                \   / 
                                 \ / 
                                 use*2 

use*2 is combined use that is done on SI mode.
This way we save the sign-extension on the def1-use2 pass.

Leehod.